Effect of topography on tree species composition and volume of coarse woody debris in an Oriental beech (Fagus orientalis Lipsky) old growth forests, northern Iran
Kiomars Sefidi (1), Fariba Esfandiary Darabad (2), Mojtaba Azaryan (3)
iForest - Biogeosciences and Forestry, Volume 9, Issue 4, Pages 658-665 (2016)
doi: https://doi.org/10.3832/ifor1080-008
Published: Mar 17, 2016 - Copyright © 2016 SISEF
Research Articles
Abstract
There is an emerging interest in the relationships between forest structure and topographic aspects. Still, such patterns have been scarcely studied in undisturbed mixed beech forests in northern Iran. We investigated the influence of topographical factors including aspect, slope degree, and landform index (LI) on the distribution of dominant tree species and coarse woody debris (CWD). Tree density and basal area were not significantly correlated with any of the measured parameters, except a moderate relation between basal area and LI (r = - 0.376; P = 0.029). Redundancy analysis (RDA) of the tree layer revealed a significant relationship between the measured environmental variables and species distributions. CWD volume showed significant negative correlation with percent canopy coverage and was highly correlated with slope. Density of CWD in decay class IV was significantly correlated with aspect and percent of canopy cover. Analyses of CWD distributions in relation to both living vegetation and topographic gradients showed a highly complex interplay of factors driving the distribution of CWD across the forest stands.
Keywords
Stand Structure, Physical Geography, Landform, Caspian Forest, Fagus orientalis
Authors’ Info
Authors’ address
Faculty of Agriculture Technology and Natural resources, University of Mohaghegh Ardabili, Ardabil (Iran)
Department of Physical Geography, University of Mohaghegh Ardabili, Ardabil (Iran)
College of Agriculture & Natural Resources, University of Tehran,Tehran (Iran)
Corresponding author
Paper Info
Citation
Sefidi K, Esfandiary Darabad F, Azaryan M (2016). Effect of topography on tree species composition and volume of coarse woody debris in an Oriental beech (Fagus orientalis Lipsky) old growth forests, northern Iran. iForest 9: 658-665. - doi: 10.3832/ifor1080-008
Academic Editor
Emanuele Lingua
Paper history
Received: Jul 19, 2013
Accepted: Nov 11, 2015
First online: Mar 17, 2016
Publication Date: Aug 09, 2016
Publication Time: 4.23 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2016
Open Access
This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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